蓄电池组坏境温度过低时，由于电池内阻增加，极化增大，电池在放电后很难正常充电，易造成负极的硫酸盐化，缩短电池寿命。
A、对
B、错
After making changes to IP aliasing and rebooting the system， an AIX server is unable to communicate with other hosts. Which command can be run to check ent0 adapter configuration relative to IP address and network mask？（）
A、ifconfig -a
B、errpt -a
C、cfgmgr -v
D、entstat -d ent0
You need to create a partitioned table to store historical data and you issued the following command： CREATE TABLE purchase_interval PARTITION BY RANGE （time_id） INTERVAL （NUMTOYMINTERVAL（1，’month’）） STORE IN （tbs1，tbs2，tbs3） （ PARTITION p1 VALUES LESS THAN（TO_DATE（’1-1-2005’， ’dd-mm-yyyy’））， PARTITION p2 VALUES LESS THAN（TO_DATE（’1-1- 2007’， ’dd-mm-yyyy’））） AS SELECT * FROM purchases WHERE time_id
A、 It returns an error because the range partitions P1 and P2 should be of the same range.
B、 It creates two range partitions （P1， P2）. Within each range partition， it creates monthwise subpartitions.
C、 It creates two range partitions of varying range. For data beyond ’1-1-2007，’ it creates partitions with a width of one month each.
D、 It returns an error because the number of tablespaces （TBS1，TBS2，TBS3）specified does not match the number of range partitions （P1，P2） specified.
直流浮充供电系统可有以下作用：（）
A、后备电源
B、平滑滤波
C、调节系统电压
D、高阻配电
You want to create the Recovery Manager (RMAN) Virtual Private Catalog (VPC) to maintain a separation of responsibilities along with a consolidation of RMAN repository. Which condition must be met before you create the VPC?（）
A、A base catalog exists
B、The recovery catalog is empty
C、The base recovery catalog must be dropped
D、A target database is registered in the recovery catalog
